Join Date: Jan 2009
Thanked 64 Times in 60 Posts
is it just when the truck is hot that it has trouble starting? If this is the case, its probably the fuel metering diaphram in the VP. The low (or in your case 0)psi supplied by the lift pump, causes the diaphram to move up to four times further than it was disigned to move, 2mm vs. 0.5mm. The higher pressure from the new lift pump can keep the diaphram from moving. This diaphram is mainly needed for warm starts.
If you are consistently having trouble starting when warm, disconnect the pigtail to the lift pump, and see if the truck will start. If the metering diaphram is the culprate, the truck should fire right up. IF IT DOES, SHUT IT OFF IMMEDIATELY!!!!!
Anyways, if the diaphram is the problem, it can be dealt with a lot cheaper than buying a new injection pump. This is a problem that I had, and fixed for about $25(If that).
Just a thought. I hate to see someone spend a lot of money they don't need to.
2000 2500 reg. cab 4x4 auto 577hp
09 6.7L QC LB stick, 4x4.
TOTAL PERFORMANCE DIESEL 707-545-FUEL (3835)